The actress said of the design house, 'Yves Saint Laurent is a brand that inspires me deeply. Since its creation, the brand has conveyed strong values that I cherish, such as unwavering commitment, absolute love and feminine audacity,’ she told WWD. 'This new fragrance is the emblem of it all. I am thrilled to be a part of this beautiful adventure.'

Chastain first came to our attention acting alongside Brad Pitt in The Tree of Life, for which she was nominated for Best Supporting Actress at the Academy Awards (she lost out to The Help’s Octavia Spencer).

Beauté International General Manager Stephan Bezy says of the hook-up, 'We were won over by the very subtle strength of Jessica Chastain, her solar charm, her free mind. Jessica embodies the quintessence of Saint Laurent's femininity, a woman of her day and age, independent, determined, never where you expect her to be,' he gushed.

The fragrance due out in August is, according to Yves Saint Laurent, 'spontaneous and free-spirited', with notes including vanilla and blackcurrant.

Click here to see our favourite Jessica Castain looks